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Using the T1 Expansion Card
11-12 PortMaster Configuration Guide
To display the line configuration for line 1, for example, enter the following command:
Command> show line1
----------------------line1 - T1 Inband DS0 ------------------
Status: UP Framing: ESF Encoding: 8ZS PCM: u-law
Signaling: Trunk E&M wink start Options: inbound calls only
Receive Level: +2dB to -7.5dB
Alarms Violations
---------------------------------------------------------------
Blue 0 Bipolar 0
Yellow 1 CRC Errors 0
Receive Carrier Loss 0 Multiframe Sync 0
Loss of Sync 0
Using the T1 Expansion Card
The T1 expansion card is identified as line2 on the PortMaster, and has the same
settings as
line0
and
line1
. Valid line types include fractional and T1. All line framing
and encoding types are supported. When set to fractional, the card supports only one
line group. The first line group found (numerically) is used for the configuration. The
fractional line group supports any number of time slots. It also supports 56Kbps
channels.
In addition to line2, a new port is added to the list of active ports. In a single-PRI
PortMaster 3, the port is identified as W2; in a two-PRI PortMaster 3 it is identified as
W48.
If the Stac compression card is present in the PortMaster 3, Stac compression can be
enabled for the T1 line.
Although the T1 expansion card is hot-swappable, when you remove the card from the
slot you must wait approximately 5 seconds before reinserting it. If you remove the card
and reinsert it immediately, the PortMaster locks up and must be restarted.
Clocking
With the T1 expansion card, you can use internal clocking on the line. Use the following
command to set clocking:
Command> set line2 clock internal|external